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Kinetic parameters of a mixed culture oxidizing sulfide and sulfur with oxygen
Author(s) -
Buisman Cees J. N.,
Jspeert Peter I,
Hof Anne,
Janssen Albert J. H.,
Hagen Robert Ten,
Lettinga Gatze
Publication year - 1991
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260380803
Subject(s) - sulfide , sulfur , chemistry , oxidizing agent , yield (engineering) , oxygen , sulfate , bacteria , inorganic chemistry , nuclear chemistry , organic chemistry , biology , materials science , metallurgy , genetics
Kinetic parameters of biological sulfide oxidation are described. The influence of the sulfide loading rate on growth yield and specific oxidation rate were investigated with free‐cell suspensions. It is concluded that at least two types of bacteria were present, namely, sulfate producers (type A) that grow at higher loading rates. Type A bacteria have a growth yield of 04 g dry S/mol S, while type B bacteria have a growth yield of 04 g dry S/mol S. Type A has a high affinity for sulfide and is inhibited by sulfide at sulfide concentrations exceeding 10 mg/L. Type B has a low affinity for sulfide and is not inhibited by sulfide, but by oxygen.